The chaffinch is one of the most widespread and abundant bird in Britain and Ireland, (“RSPB,” n.d.). Monitoring of the phenotype of species is important for the species and can give indication changes in phenotypic plasticity or genetic variation, (Blackburn et al. 2013).
This data looks at the differences in mass between the male chaffinch, @ref(fig: male chaffinch figure) and the female chaffinch, @ref(fig: female chaffinch figure).
Male Chaffinch, By Andreas Trepte - Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=15264293
Female Chaffinch, By 4028mdk09 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=20640633
Importing and summarising the data from chaff.txt.
## # A tibble: 2 x 2
## sex ss
## <chr> <dbl>
## 1 females 86.8
## 2 males 87.9
## # A tibble: 2 x 5
## sex mean n sd se
## <chr> <dbl> <int> <dbl> <dbl>
## 1 females 20.5 20 2.14 0.107
## 2 males 22.3 20 2.15 0.108
Blackburn, Tim M, Melanie J Monroe, Becki Lawson, Phillip Cassey, and John G Ewen. 2013. “Body Size Changes in Passerine Birds Introduced to New Zealand from the UK.” NeoBiota 17 (June): 1–18. https://doi.org/10.3897/neobiota.17.4841.